Question

The concrete slab rests on four identical steelbars. The weight of the plate is 83000 kg, rest length of steel bars are 220.0 cm and the cross-sectional area of each rod is 46 cm^2The mass of the steel bars is not taken into account and it is assumed that the weight of the concrete slab is evenly distributed among the bars. A) How much stress does steel rods affect? B) How much have steel bars shortened from their rest length?

Fig: 1